Disclosed herein are hair care compositions and methods of using same. The compositions may be substantially anhydrous, and optically clear. The hair care compositions, when mixed with water, create an exothermic reaction, for example, when mixed with hair that has been pre-wetted. The mixture with water further causes the composition to become opaque, much like a traditional conditioning agent. The compositions may be left on the wetted hair and subjected to heat for enhanced treatment of the hair.